+ (string)

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s1 + s2
mysqlNo CONCAT(s1,s2)
oracleNos1 || s2
postgresNos1 || s2

+ (strings)

+ allows you to stick two or more strings together.

This operation is concatenation.

   s1 + s2     

In this example you put the region and the name together for each country.

SELECT CONCAT(region,name)
  FROM bbc
SELECT region || name
  FROM bbc
SELECT region + name
  FROM bbc

See also

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